Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 29/34] perf symbols: Set freed members to NULL in dso destructor | Date | Tue, 10 Dec 2013 17:31:11 -0300 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
To help in debugging use after free bugs.
Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-3ckwsob2g1q23s77nuhexrq7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/dso.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 2c7e1899a735..19babb0d365d 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -475,13 +475,23 @@ void dso__delete(struct dso *dso) int i; for (i = 0; i < MAP__NR_TYPES; ++i) symbols__delete(&dso->symbols[i]); - if (dso->short_name_allocated) + + if (dso->short_name_allocated) { free((char *)dso->short_name); - if (dso->long_name_allocated) + dso->short_name = NULL; + dso->short_name_allocated = false; + } + + if (dso->long_name_allocated) { free((char *)dso->long_name); + dso->long_name = NULL; + dso->long_name_allocated = false; + } + dso_cache__free(&dso->cache); dso__free_a2l(dso); free(dso->symsrc_filename); + dso->symsrc_filename = NULL; free(dso); } -- 1.8.1.4
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